Relief-valve.



N. B. SANDS.

RELIEF VALVE.- APPLICATION FILED m. 30. 1912.

1,214,595. Patented Feb. 6,1917.

entor Attorneys I UNllTEED TAE PATNT FFTCE.

NATHAN BIsANDs, or BALTIMORE, 01110.-

RELIEF-VALVE.

Baltimore, in the. county of Fairfield and State of Ohio, have invented a new and useful Relief-Valve, of which the following is a specification.

. The present invention relates to improvements in relief valves, the primary object of the invention being the provision of a novel form or valve adapted to be disposed in a pipe line and so constructed and arranged as to relieve any undue pressure therein due to the freezing of the liquid N within the pipe, andthereby prevent the bursting of the pipe during exceedingly cold weather.

With the foregoing and other objects which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from thespirit of the invention.

In the drawings-Figure 1 is a side elevation of the relief valve in operable relation to a pipe line. Fig. 2 is a vertical central sectional view through the valve. Fig. 3 is a section taken on line 3-3 of Fig. 2. Fig. 4 is a perspective View of the disk wing valve employed.

Referring to the drawin s, the numeral 1 designates the pipe line for conveyin either hot or cold water and has connecte therein a T-coupling disposed invertedly for the reception of the relief valve 3, which is preferably disposed in a vertical position. This valve consists.ofthe lower coupling member 4, whose lower reduced end is adapted to be threaded into the upper nipple of the T-coupling and is provided with the 1 shouldered portion 5 to permit of the easy assembling of the valve with relation to the coupling. The exteriorly threaded ring 6 provides a proper connection for the conpling 4, wh1le the coupling 4 is provided. with the enlarged chamber 7 and with the valve seated portion 8 for the reception of the wing valve 9 which is provided with the guiding wings- 10 and valve disk 11', as

I joint, of a pressure relief valve comprising a clearly shown in Fig. 4. Upon the opposite side of the disk concentrically thereof is a Specification of Letters Patent.

Application filed March 30, 1912. Serial No. 687,381.

stud 12, the purpose of which will presently appear.

The upper member 13 of the relief valve is provided with the lower chambered portion 14 which fits upon the threaded portion 6 of the coupling 4 and constitutes a chain-- ber above the disk portion 11 of the wing valve 9 provided with a plurality of apertures l5 which; provide eduction ports for the water when the wing valve 9 is actuated due to the increased pressure within the pipe line 1. The upper member 13 is provided with the concentrically disposed cylindrical socket 16 which terminates in the reduced threaded bore 17 for the reception of the adjusting screw 18, said adjusting screw having its lower end disposed toabut the headed stud 19 whose reduced -end 20 is disposed in opposition to the stud 12 of the wing: valve 9 and provides with the stud 12 the proper hOldiIlg means for the respective terminals of the 'coil spring 21 which is disposed within the concentric bore 16 of the valve member 13. By this means the screw 18 may be adjusted to exert any desired tension upon the spring 21 and thus resiliently hold the wing valve 9 seated within the enlarged portion 7 of the coupling 4 and upon the valve seat rim 8 thereof, the tension of the spring being such as to ordinarily prevent the pressure within the line pipe 1 from lifting the wing valve 9, but which however, due to any abnormal increased pressure within the pipe line 1, due to the freezing of the water within the pipe at or near the relief valve, will cause the lifting of the Wing valve and thereby permit the liquid to escape through the aperture 15 and thus relieve the abnormal pressure within the pipe line 1 and thus revent the bursting of the pipe at its wea (est point.

It will be noted by referring particularly to Fig. 2 that the length of valve 9 from the top of the disk 11-to the bottom of the wings 10 is slightly greater than the length of the chamber 14. Thus when the valve is completely unseated and-is bearing against the upper end of the chamber 14, the Wings 10 The combination with a pipe havinga T-L coupling member engaging said joint and tion ofthe first named member and having an annular series of outlet openings, there being a recess extending longitudinally within said chambered member and c0m municating With the chamber therein, a. spring seated snugly Within said recess, a valve including a disk and wings extending therefrom, said spring normally bearing against the disk to holddit upon the seat and said Wings being shdably mounted within the counter bore in the coupling member,

the length of the chamber being less than the length of the valve Whereby' the lower ends of the Wings of thevalve are maintained constantly within the counter bore, and means adjustably mounted in the end Wall of the recess for varying the compres sion of the spring the recess being of such length that the spring serves also as a guide forthe valve.

In testimony that 1 claim the foregoing as my 0\vn,'I have hereto aflixed my signature in the presence of tWo Witnesses.

NATHAN 13 SANDS. lVitnesses ELnon O. VVEIST, ERNEsT BYnn. 

